Remove "mdns4" from "hosts:" list in nsswitch.conf
"mdns4" was present in the "hosts:" line since the initial filesystem package commit: 65e8435c. It was accidentally removed in 3e4acb1b. Then 0bebcfc8 promptly restored it, along with "mdns4_minimal [NOTFOUND=return]", in response to an issue raised on Manjaro forum.
The "mdns4_minimal [NOTFOUND=return]" part is recommended by ArchWiki and should be fine. But a comment under this Arch Linux bug says:
Using "mdns" instead of "mdns_minimal" will significantly increase reverse lookup time ( https://github.com/lathiat/nss-mdns/issues/46#issuecomment-381936000 ), so recommending "mdns" as the default is not desirable.
Debian has dropped the "mdns" item in response to an upstream developer's request. So I think the "mdns" item should be removed from Manjaro's "hosts:" line. The restored "mdns4_minimal [NOTFOUND=return]" part should be enough for most users.